ACOUSTIC NOISE AND VIBRATIONS OF ELECTRIC POWERTRAINS
|
|
- Gyles Leonard
- 5 years ago
- Views:
Transcription
1 ACOUSTIC NOISE AND VIBRATIONS OF ELECTRIC POWERTRAINS Focus on electromagnetically-excited NVH for automotive applications and EV/HEV Part 4 NVH experimental characterization of electric chains LE BESNERAIS Jean contact@eomys.com Note: this presentation is based on extracts of EOMYS technical training EOMYS ENGINEERING
2 NVH EXPERIMENTAL CHARACTERIZATION OF ELECTRIC POWERTRAIN EOMYS ENGINEERING
3 Introduction To fully characterize the vibro-acoustic behaviour of an electrical machine or build accurate simulation models (whatever their type, FEA or analytical), some experiments are necessary Acoustic measurements of Sound Power Level of noise source -> Techniques described in Standards depend on environment The characterization of structural modes can be done based on two main techniques: - experimental modal analysis (EMA) - operational modal analysis (OMA) No standard for experimental modal analysis (EMA) nor operational modal analysis (OMA) EMA: use of external excitation (e.g. hammer, shaker) / OMA: use of internal excitation (e.g. magnetic forces) EMA gives Frequency Response Functions but not OMA The characterization of the excitation forces can be done using the Operational Deflection Shape analysis (ODS) EOMYS ENGINEERING
4 Experimental Modal Analysis To identify stator circumferential modes, the number of accelerometers depends on the wave number to be captured To identify basic cylinder modes without torsion one can use radial accelerometers only To identify the circumferential mode m, at least 2m accelerometers are required 2m+1 advised to avoid a sensor being at a node position Impact hammer technique may not be adapted to large electrical machines (large noise to signal ratio) EOMYS ENGINEERING
5 To identify lamination main cylinder structural modes it is advised to run the EMA before the full assembly, especially if a high frequency mode has to be studied A high modal density of the full system (incl. windings, frame, cooling system, boxes, etc) can make the modal identification tedious Running EMA along the different assembly steps (welding of ribs, coil insertion, VPI, etc) allows to identify the contribution of each new element to stiffness / mass / damping The boundary conditions of the full assembly may differ from the one of the lamination package alone EMA allows to identify all the structural modes, even those which cannot be excited by magnetic forces EOMYS ENGINEERING
6 Operational Modal Analysis The meshing procedure is the same as for EMA but the internal excitation coming from magnetic forces is used Therefore only structural modes that be excited by internal forces are characterized Vibration data can be recorded during run-ups in order to excite the structure over a wide range of frequencies The real operational conditions (current level & load state, boundary conditions, temperature etc) can be used The FRF cannot be normalized to a force magnitude (e.g. m/s 2 /N) except if they are calculated independently of the tests mode 2 mode 3 EOMYS ENGINEERING
7 Operational Deflection Shapes ODS consists in visualizing how the structure deflects at a given frequency Far from any resonance, the vibration pattern corresponds to the excitation force pattern At resonance the visualized deflection is the corresponding modal deflection shape The number of nodes, the nature of the vibration wave (rotating / pulsating) and the rotation direction can be observed From [F4] EOMYS ENGINEERING
8 From [F4] EOMYS ENGINEERING
9 HW & SW minimum set-up 1 radial accelerometer in the middle of the stator lamination (or rotor yoke for outer rotor machine) 1 microphone 1 m away from the outer frame, in the middle of the frame axis 1 tachometer 1 current probe for phase current Torque ripple characteristics can be indirectly recorded through angular speed derivation and tangential accelerometer on the stator Fine band FFT Averaged FFT Spectrograms Sound pressure level with and without A weighting 1/3 octave analysis is generally only useful to check standard requirements EOMYS ENGINEERING
10 Run-ups / order analysis To characterize magnetic noise & vibration, recording during run-ups (variation of the speed from 0 to max speed) are useful as they allow to excite the structure at variable frequency For PMSM the open-circuit excitation magnitude is independent of speed The ideal run-up is linear increase of speed with constant magnetic excitation A constant excitation allows to distinguish structural resonances (e.g. noise level is not reduced due to defluxing, but because we go further away from resonance) In SM (or IM at no-load) the magnetic forces frequencies linked to the fundamental current are all proportional to f s The proportional factor between the vibration frequency and the mechanical frequency is known as an «order» (WARNING this has nothing to do with the spatial frequency) In order to obtain the magnitude of these vibration as a function of speed, the sampling frequency is retuned proportionally to the rotational speed = «order tracking analysis» EOMYS ENGINEERING
11 Linear run-up: - all magnetic force harmonics linked to fundamental current are straight lines crossing 0 rpm, 0 Hz - Natural frequencies appear as vertical lines - Resonance appear at the crossing between «diagonal excitations and vertical modes» From [F3] From [F3] Corresponding order analysis: - all magnetic force harmonics linked to fundamental current are verticals - Natural frequencies appear as parabolas EOMYS ENGINEERING
12 Due to finite response time of structural eigen modes, run-ups must be «long enough» to capture resonances The maximum sweep rate [Hz/s] can be defined using ISO ξ i f i [Hz] S max [Hz/s] N max -N min [rpm] Sweep time [s] 0.5% % % % The higher the natural frequency and the damping, the faster the run-up can be EOMYS ENGINEERING
13 rpm rpm rpm rpm rpm Spatiograms Spatiogram = spectrogram by circumferential wavenumber = r=0 + r=-2 Hz Hz Hz + r=+2 + r=+4 + r=-4 Hz Hz Hz EOMYS ENGINEERING
14 rpm rpm rpm rpm Spatiograms can also represent negative wavenumbers with negative frequencies = r=0 r=0 Hz Hz + r=-2 r=+2 + r=-4 r=+4 Hz Hz EOMYS ENGINEERING
15 Spatiograms can be obtained by running classical spectrograms on spatially filtered acceleration signals EOMYS ENGINEERING
16 NVH type tests for synchronous machines Standard test Run-up at no-load (+ order analysis) Run-up at nominal load (+ order analysis) Run-down in open-circuit from maximum speed Investigation test Effect of PWM switching Field weakening / effect of current angle ODS at resonances OMA EOMYS ENGINEERING
17 WARNING, for PM machines a real no-load run-up does not exist (or the rotor must be rotated by an external motor in generator mode), it must be made with a coast-down Armature field introduces additional vibration harmonics due to PWM + pole/armature interaction Additional lines EOMYS ENGINEERING
18 NVH type tests for induction machines Standard test Run-up at no-load (+ order analysis) Run-up at nominal load (+ order analysis) Run-down from maximum speed by shutting off current Investigation test Effect of PWM switching Effect of E/f (saturation) ODS at resonances OMA EOMYS ENGINEERING
19 Ex of a data acquisition system project set-up Fine band spectra & tacho Spectrogram + averaged FFT of the phase current Spectrogram + averaged FFT of the radial & tangential acceleration Spectrogram + averaged FFT of the SPL Overall SPL (dba and db, to avoid artificial resonance due to dba increase) Acceleration and current Time analysis of SPL Coupling with converter control to have Id / Iq Extraction of LCM(Zs,2p) orders EOMYS ENGINEERING
20 Experimental interpretations Interpretations of run-ups (sonagrams / spectrograms): WRSM [F3] p=2 Zs=48 (m,f)=(4,44*fr)=(-4,22*fs) and (4,52*fR)=(4,26*fs) in resonance with the circumferential mode m=2p=4 (0,48*fR)=(0,24*fs) in resonance with breathing mode m=0 EOMYS ENGINEERING
21 Interpretations of run-ups (sonagrams / spectrograms): SPMSM SPMSM (p=7, Zs=42) with external rotor 200 Hz (mode 2) 400 Hz (mode 3) 1200 Hz (mode 4) 3200 Hz (mode 0) LCM(Zs,2p)/p=6 Resonance between 18*fs with mode 0 EOMYS ENGINEERING
22 Interpretations of run-ups (sonagrams / spectrograms): IPMSM [F1] Traction application, acoustic noise sonagram Zs=60, p=5 LCM(Zs,2p)=60 Abrupt magnitude changes corresponds to control changes (MTPA, constant power, constant voltage) 0-th order no-load magnetic forces are proportional to 12fs PWM lines appear around 12 khz and 5 khz 6fs and 18fs are here due to an unbalance of the current flowing in the double layer windings [F2] EOMYS ENGINEERING
23 Traction application, acoustic noise sonagram Zs=48, p=4 LCM(Zs,2p)=48 Gearbox mesh frequencies H10,5 H21 H29 H58 vibration noise EOMYS ENGINEERING
24 Interpretations of run-ups (sonagrams / spectrograms): SCIM From [F4] Sinusoidal supply, vibration spectrogram Z s =27, Z r =21, p=2 EOMYS ENGINEERING
25 Traction application in sinusoidal supply, acoustic noise sonagram Z s =36, Z r =26, p=3 1: saturation line of order Zr-Zs+4p=2 and frequency f s (Z r /p+4) resonating with ovalization mode at 700 Hz 3: slotting line of order Zr-Zs+2p=4 and frequency f s (Z r /p+2) 2: winding line of order Zr-Zs-p+5p=-2 and frequency f s (Z r /p-2) From [F4] EOMYS ENGINEERING
26 From [F4] Traction application with asynchronous PWM, acoustic noise sonagram Z s =48, Z r =38, p=2 Saturation line of order Zr-Zs+4p=-2 and frequency f(zr/p+4) resonating with ovalization mode at 600 Hz Slotting+PWM interactions have same slope than slotting lines EOMYS ENGINEERING
27 slotting 1 calculated angle fc=1 f s 2 calculated angles fc=5 f s 3 calculated angles fc=7 f s 5 calculated angles fc=11 f s Synchronous PWM fc=15 f s Synchronous PWM fc=21 f s Asynchronous PWM fc=600 Hz Traction application with asynchronous / synchronous / CA PWM, acoustic noise sonagram Change of PWM strategy gives sudden noise change (discontinuity of the equivalent switching frequency) Continuous acoustic lines are linked to the fundamental current (slotting, saturation, etc) EOMYS ENGINEERING
28 NVH source discrimination methodology on induction machines Check background noise of motor (e.g. pumps) Check non magnetic noise sources (e.g. fans, gears, etc) Shut down the current to confirm magnetic origin of noise Vary saturation level / switching frequency to identify saturation & PWM excitations Analyse the spectrum & compare with theory to find wavenumbers & frequencies Analyse the current to identify eccentricities, switching, principal slotting harmonics Run order analysis / ODS to confirm a resonance or a forced mode EOMYS ENGINEERING
29 NVH source discrimination methodology on synchronous machines Check background noise of motor (e.g. pumps) Check non magnetic noise sources (e.g. fans, gears, etc) Shut down the current to obtain acoustic noise without armature field If possible make a run-up with demagnetized magnets to obtain acoustic noise without magnet field Vary saturation level / switching frequency to identify saturation & PWM excitations Analyse the spectrum & compare with theory to find wavenumbers & frequencies Analyse the current to identify eccentricities, switching, principal slotting harmonics Run order analysis / ODS to confirm a resonance or a forced mode EOMYS ENGINEERING
Jean LE BESNERAIS 26/09/ EOMYS ENGINEERING / /
Fast calculation of acoustic noise and vibrations due to magnetic forces during basic and detailed design stages of electrical machines using MANATEE software Jean LE BESNERAIS 26/09/18 contact@eomys.com
More informationACOUSTIC NOISE AND VIBRATIONS DUE TO MAGNETIC FORCES IN ROTATING ELECTRICAL MACHINES
TECHNICAL TRAINING TTR01 ACOUSTIC NOISE AND VIBRATIONS DUE TO MAGNETIC FORCES IN ROTATING ELECTRICAL MACHINES 1 OBJECTIVES The objectives of the full technical training including all option modules are
More informationAnalysis of the electromagnetic acoustic noise and vibrations of a high-speed brushless DC motor
Analysis of the electromagnetic acoustic noise and vibrations of a high-speed brushless DC motor J. Le Besnerais, Q. Souron, E. Devillers EOMYS ENGINEERING, www.eomys.com 1 A. Introduction Square-wave-driven
More informationACOUSTIC NOISE AND VIBRATIONS OF ELECTRIC POWERTRAINS
ACOUSTIC NOISE AND VIBRATIONS OF ELECTRIC POWERTRAINS Focus on electromagnetically-excited NVH for automotive applications and EV/HEV Part 2 Characterization of electromagnetic NVH in electric motors LE
More informationNoise & vibrations due to magnetic forces in electrical machines
Noise & vibrations due to magnetic forces in electrical machines Root cause analysis and mitigation using MANATEE software The webinar will start soon. Please check your audio/video settings (mute your
More informationAnalysis of the electromagnetic acoustic noise and vibrations of a high-speed brushless DC motor
Analysis of the electromagnetic acoustic noise and vibrations of a high-speed brushless DC motor J. Le Besnerais*, Q. Souron*, E. Devillers** *EOMYS ENGINEERING, www.eomys.com ** L2EP, Ecole Centrale Lille,
More informationNVH analysis of a 3 phase 12/8 SR motor drive for HEV applications
NVH analysis of a 3 phase 12/8 SR motor drive for HEV applications Mathieu Sarrazin 1, Steven Gillijns 1, Jan Anthonis 1, Karl Janssens 1, Herman van der Auweraer 1, Kevin Verhaeghe 2 1 LMS, a Siemens
More informationCharacterization of acoustic noise and vibrations due to magnetic forces in induction machines for transport applications using MANATEE software
Characterization of acoustic noise and vibrations due to magnetic forces in induction machines for transport applications using MANATEE software E.Devillers 1,2, J. Le Besnerais 1, Q. Souron 1, M. Hecquet
More informationOverview of IAL Software Programs for the Calculation of Electrical Drive Systems
for the Calculation of Electrical Drive Systems Combines FEM with analytical post-processing analytical Machine type Topic Electrically excited Salientpole rotor Synchronous machines Cylindrical rotor
More informationMANATEE SIMULATION SOFTWARE Magnetic Acoustic Noise Analysis Tool for Electrical Engineering
MANATEE SIMULATION SOFTWARE Magnetic Acoustic Noise Analysis Tool for Electrical Engineering Presentation of MANATEE software (v1.05) developed and distributed by EOMYS (www.eomys.com) I. PRESENTATION
More informationCASE STUDY OF OPERATIONAL MODAL ANALYSIS (OMA) OF A LARGE HYDROELECTRIC GENERATOR
CASE STUDY OF OPERATIONAL MODAL ANALYSIS (OMA) OF A LARGE HYDROELECTRIC GENERATOR F. Lafleur 1, V.H. Vu 1,2, M, Thomas 2 1 Institut de Recherche de Hydro-Québec, Varennes, QC, Canada 2 École de Technologie
More informationA METHOD FOR A MODAL MEASUREMENT OF ELECTRICAL MACHINES
A METHOD FOR A MODAL MEASUREMENT OF ELECTRICAL MACHINES PACS: 43.40.At Sebastian Fingerhuth 1 ; Roman Scharrer 1 ; Knut Kasper 2 1) Institute of Technical Acoustics RWTH Aachen University Neustr. 50 52066
More informationCopyright 2017 by Turbomachinery Laboratory, Texas A&M Engineering Experiment Station
HIGH FREQUENCY VIBRATIONS ON GEARS 46 TH TURBOMACHINERY & 33 RD PUMP SYMPOSIA Dietmar Sterns Head of Engineering, High Speed Gears RENK Aktiengesellschaft Augsburg, Germany Dr. Michael Elbs Manager of
More informationNOISE AND VIBRATIONS IN ELECTRIC MACHINES
NOISE AND VIBRATIONS IN ELECTRIC MACHINES Review of NVH sources & mitigation of electromagnetically-excited noise LE BESNERAIS Jean REGNIEZ Margaux 21 th September 2017 www.eomys.com contact@eomys.com
More informationApplication of Fiber Optic Sensors for Stator End Winding Vibration Monitoring. M. Sasic, R. Sadanandan, G. Stone Iris Power Qualitrol
Application of Fiber Optic Sensors for Stator End Winding Vibration Monitoring M. Sasic, R. Sadanandan, G. Stone Iris Power Qualitrol What is endwinding? Endwinding Slot Objectives of the Support System
More informationNew Experimental Method for Switching Noise of Motors
EVS28 KINTEX, Korea, May 3-6, 2015 New Experimental Method for Switching Noise of Motors Hyunsu Kim 1, Myunggyu Kim 2 1 Research & Development Division, Hyundai Motor Company 2 Research & Development Division,
More informationModel Correlation of Dynamic Non-linear Bearing Behavior in a Generator
Model Correlation of Dynamic Non-linear Bearing Behavior in a Generator Dean Ford, Greg Holbrook, Steve Shields and Kevin Whitacre Delphi Automotive Systems, Energy & Chassis Systems Abstract Efforts to
More informationOn the accuracy reciprocal and direct vibro-acoustic transfer-function measurements on vehicles for lower and medium frequencies
On the accuracy reciprocal and direct vibro-acoustic transfer-function measurements on vehicles for lower and medium frequencies C. Coster, D. Nagahata, P.J.G. van der Linden LMS International nv, Engineering
More informationEEE, St Peter s University, India 2 EEE, Vel s University, India
Torque ripple reduction of switched reluctance motor drives below the base speed using commutation angles control S.Vetriselvan 1, Dr.S.Latha 2, M.Saravanan 3 1, 3 EEE, St Peter s University, India 2 EEE,
More information1 INTRODUCTION 2 MODELLING AND EXPERIMENTAL TOOLS
Investigation of Harmonic Emissions in Wound Rotor Induction Machines K. Tshiloz, D.S. Vilchis-Rodriguez, S. Djurović The University of Manchester, School of Electrical and Electronic Engineering, Power
More informationCOMPARISON OF NUMERICALLY DETERMINED NOISE OF A 290 KW INDUCTION MOTOR USING FEM AND MEASURED ACOUSTIC RADIATION
Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Nr 66 Politechniki Wrocławskiej Nr 66 Studia i Materiały Nr 32 2012 Masen AL NAHLAOUI*, Hendrik STEINS*, Stefan KULIG*, Sven EXNOWSKI* inverter-fed,
More informationNoise and Vibration Prediction in Shunt- Reactor using Fluid Structure Interaction Technique
Noise and Vibration Prediction in Shunt- Reactor using Fluid Structure Interaction Technique by PARMATMA DUBEY CROMPTON GREAVES LTD. parmatma.dubey@cgglobal.com and VIJENDRA GUPTA CROMPTON GREAVES LTD.
More informationOptimization of rotor shape for constant torque improvement and radial magnetic force minimization
DOI: 10.1007/s11771 01 101 7 Optimization of rotor shape for constant torque improvement and radial magnetic force minimization CHO Gyu-won, WOO Seok-hyun, JI Seung-hun, PARK Kyoung-won, JANG Ki-bong,
More informationNON-SELLABLE PRODUCT DATA. Order Analysis Type 7702 for PULSE, the Multi-analyzer System. Uses and Features
PRODUCT DATA Order Analysis Type 7702 for PULSE, the Multi-analyzer System Order Analysis Type 7702 provides PULSE with Tachometers, Autotrackers, Order Analyzers and related post-processing functions,
More informationContents. About the Authors. Abbreviations and Symbols
About the Authors Preface Abbreviations and Symbols xi xiii xv 1 Principal Laws and Methods in Electrical Machine Design 1 1.1 Electromagnetic Principles 1 1.2 Numerical Solution 9 1.3 The Most Common
More information3.1.Introduction. Synchronous Machines
3.1.Introduction Synchronous Machines A synchronous machine is an ac rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature. The magnetic
More informationUnbalance Detection in Flexible Rotor Using Bridge Configured Winding Based Induction Motor
Unbalance Detection in Flexible Rotor Using Bridge Configured Winding Based Induction Motor Natesan Sivaramakrishnan, Kumar Gaurav, Kalita Karuna, Rahman Mafidur Department of Mechanical Engineering, Indian
More informationApplication of Electrical Signature Analysis. Howard W Penrose, Ph.D., CMRP President, SUCCESS by DESIGN
Application of Electrical Signature Analysis Howard W Penrose, Ph.D., CMRP President, SUCCESS by DESIGN Introduction Over the past months we have covered traditional and modern methods of testing electric
More informationRotating Machinery Fault Diagnosis Techniques Envelope and Cepstrum Analyses
Rotating Machinery Fault Diagnosis Techniques Envelope and Cepstrum Analyses Spectra Quest, Inc. 8205 Hermitage Road, Richmond, VA 23228, USA Tel: (804) 261-3300 www.spectraquest.com October 2006 ABSTRACT
More informationParameter-independent estimation strategy combining HF signal injection and sliding mode methodology for AC self-sensing control machines.
Parameter-independent estimation strategy combining HF signal injection and sliding mode methodology for AC self-sensing control machines. Application to EV/HEV powertrains Renault - Ecole Centrale de
More informationAnalysis of Wound Rotor Induction Machine Low Frequency Vibroacoustic Emissions under Stator Winding Fault Conditions
Analysis of Wound Rotor Induction Machine Low Frequency Vibroacoustic Emissions under Stator Winding Fault Conditions N Sarma, Q Li, S. Djurović, A C Smith, S M Rowland University of Manchester, School
More informationVibration Fundamentals Training System
Vibration Fundamentals Training System Hands-On Turnkey System for Teaching Vibration Fundamentals An Ideal Tool for Optimizing Your Vibration Class Curriculum The Vibration Fundamentals Training System
More informationOperational modal analysis applied to a horizontal washing machine: A comparative approach Sichani, Mahdi Teimouri; Mahjoob, Mohammad J.
Aalborg Universitet Operational modal analysis applied to a horizontal washing machine: A comparative approach Sichani, Mahdi Teimouri; Mahjoob, Mohammad J. Publication date: 27 Document Version Publisher's
More informationCylindrical rotor inter-turn short-circuit detection
Cylindrical rotor inter-turn short-circuit detection by Kobus Stols, Eskom A strayflux probe is commonly used in the industry to determine if any inter-turn short-circuits are present in the field winding
More informationSensorless Control of a Novel IPMSM Based on High-Frequency Injection
Sensorless Control of a Novel IPMSM Based on High-Frequency Injection Xiaocan Wang*,Wei Xie**, Ralph Kennel*, Dieter Gerling** Institute for Electrical Drive Systems and Power Electronics,Technical University
More informationGear Transmission Error Measurements based on the Phase Demodulation
Gear Transmission Error Measurements based on the Phase Demodulation JIRI TUMA Abstract. The paper deals with a simple gear set transmission error (TE) measurements at gearbox operational conditions that
More informationMonitoring The Machine Elements In Lathe Using Vibration Signals
Monitoring The Machine Elements In Lathe Using Vibration Signals Jagadish. M. S. and H. V. Ravindra Dept. of Mech. Engg. P.E.S.C.E. Mandya 571 401. ABSTRACT: In any manufacturing industry, machine tools
More informationNoise and Vibration in PM Motors Sources and Remedies
Noise and Vibration in PM Motors Sources and Remedies 1 A typical Rubber Ferrite Magnet Iso / Anisotropic Iso Iso Remanence Coercive Force Intrinsic Coercive Force Max. Energy Product Br Hcb Hcj (BH)max
More informationTransformer core noise and vibration prediction methodology
Transformer core noise and vibration prediction methodology Parmatma Dubey, Manager Technology Sarang Dev, Executive- Technology Atul Daga, Sr. Executive- Technology Date: June 11, 2014 CG Background Avantha
More informationExperimental Modal Analysis
Experimental Modal Analysis Joe Spadola What is modal analysis? 2 Modal Analysis is the process of characterizing the dynamics of a structure in terms of its dynamic properties. The dynamic characteristics
More informationLecture on Angular Vibration Measurements Based on Phase Demodulation
Lecture on Angular Vibration Measurements Based on Phase Demodulation JiříTůma VSB Technical University of Ostrava Czech Republic Outline Motivation Principle of phase demodulation using Hilbert transform
More information9LEUDWLRQ 0HDVXUHPHQW DQG $QDO\VLV
9LEUDWLRQ 0HDVXUHPHQW DQG $QDO\VLV l l l l l l l l Why Analysis Spectrum or Overall Level Filters Linear vs. Log Scaling Amplitude Scales Parameters The Detector/Averager Signal vs. System analysis BA
More informationAPPLICATION NOTE 3560/7702. Introduction
APPLICATION NOTE Order Tracking of a Coast-down of a Large Turbogenerator by Svend Gade, Henrik Herlufsen and Hans Konstantin-Hansen, Brüel& Kjær, Denmark In this application note, it is demonstrated how
More informationCompensating for speed variation by order tracking with and without a tacho signal
Compensating for speed variation by order tracking with and without a tacho signal M.D. Coats and R.B. Randall, School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney
More informationNatural Frequencies and Resonance
Natural Frequencies and Resonance A description and applications of natural frequencies and resonance commonly found in industrial applications Beaumont Vibration Institute Annual Seminar Beaumont, TX
More informationComparison of Audible Noise Caused by Magnetic Components in Switch-Mode Power Supplies Operating in Burst Mode and Frequency-Foldback Mode
Comparison of Audible Noise Caused by Magnetic Components in Switch-Mode Power Supplies Operating in Burst Mode and Frequency-Foldback Mode Laszlo Huber and Milan M. Jovanović Delta Products Corporation
More informationVertical-Vibration Suppressing Design of Accumulator with New Vibration-Measuring Method
Session C-19 : NVH II Manuscript Reference No. 1158 Vertical-Vibration Suppressing Design of Accumulator with New Vibration-Measuring Method Hikaru Wada Technology and Innovation Center Daikin Industries,
More informationA Novel Approach to Electrical Signature Analysis
A Novel Approach to Electrical Signature Analysis Howard W Penrose, Ph.D., CMRP Vice President, Engineering and Reliability Services Dreisilker Electric Motors, Inc. Abstract: Electrical Signature Analysis
More informationVIBRATION ESTIMATION, ASSESSMENT AND PROGNOSIS IN ELECTRICAL MACHINES
National Journal on Electronic Sciences & Systems, Vol. 6 No. 2 October 2015. 10 VIBRATION ESTIMATION, ASSESSMENT AND PROGNOSIS IN ELECTRICAL MACHINES 1C.N. Gnanaprakasam, 2 K. Chitra 1 Research scholar
More informationMode-based Frequency Response Function and Steady State Dynamics in LS-DYNA
11 th International LS-DYNA Users Conference Simulation (3) Mode-based Frequency Response Function and Steady State Dynamics in LS-DYNA Yun Huang 1, Bor-Tsuen Wang 2 1 Livermore Software Technology Corporation
More informationAnalysis of Losses in High Speed Slotless PM Synchronous Motor Integrated the Added Leakage Inductance
International Conference on Power Electronics and Energy Engineering (PEEE 2015) Analysis of Losses in High Speed Slotless PM Synchronous Motor Integrated the Added Leakage Inductance B.Q. Kou, H.C. Cao
More informationFundamentals of Vibration Measurement and Analysis Explained
Fundamentals of Vibration Measurement and Analysis Explained Thanks to Peter Brown for this article. 1. Introduction: The advent of the microprocessor has enormously advanced the process of vibration data
More informationFrequency Response Function Measurements of Disc and Drum Brake With its Verification by CAE
Frequency Response Function Measurements of Disc and Drum Brake With its Verification by CAE Aniket B. Ghatwai 1, Prof. S.V. Chaitanya 2, Sandip B. Phadke 3 1 Student at AISSMS COE,PUNE,Maharashtra 2Prof.
More informationMEGA Servo setup procedure for driving PMS motor
Application Note AN-MEGA-0016-v105EN MEGA Servo setup procedure for driving PMS motor Inverter type FRENIC MEGA (-EAQ Type) Software version 1700 Required options OPC-G1-PG, OPC-G1-PG2, OPC-G1-PG22, OPC-G1-PMPG
More informationA study of Vibration Analysis for Gearbox Casing Using Finite Element Analysis
A study of Vibration Analysis for Gearbox Casing Using Finite Element Analysis M. Sofian D. Hazry K. Saifullah M. Tasyrif K.Salleh I.Ishak Autonomous System and Machine Vision Laboratory, School of Mechatronic,
More informationElectromagnetic and thermal model for Brushless PM motors
22 December 2017 Motor-CAD Software Tutorial: Electromagnetic and thermal model for Brushless PM motors Contents 1. Description... 1 2. Model Definition... 2 3. Machine Geometry... 3 4. Winding Definition...
More informationType of loads Active load torque: - Passive load torque :-
Type of loads Active load torque: - Active torques continues to act in the same direction irrespective of the direction of the drive. e.g. gravitational force or deformation in elastic bodies. Passive
More informationNoise minimization of three-phase current machines by variation and modification of control scheme and power electronics
Noise minimization of three-phase current machines by variation and modification of control scheme and power electronics Stefan Soter, Roland Lach Institute of Electrical Machines, Drives and Power Electronics
More informationFuminori Ishibashi Shibaura Institute of
Space Distribution of Electromagnetic Forces of Induction Motor Fuminori Ishibashi Shibaura Institute of Technology,Minato-ku,Tokyo,108-8548,Japan,ishif@sic.shibaura-it.ac.jp Shinichi Noda Toshiba Corporation,
More informationCHAPTER 3 THE DESIGN OF TRANSMISSION LOSS SUITE AND EXPERIMENTAL DETAILS
35 CHAPTER 3 THE DESIGN OF TRANSMISSION LOSS SUITE AND EXPERIMENTAL DETAILS 3.1 INTRODUCTION This chapter deals with the details of the design and construction of transmission loss suite, measurement details
More informationInvestigation of Magnetic Field and Radial Force Harmonics in a Hydrogenerator Connected to a Three-Level NPC Converter
Investigation of Magnetic Field and Radial Force Harmonics in a Hydrogenerator Connected to a Three-Level NPC Converter Mostafa Valavi, Arne Nysveen, and Roy Nilsen Department of Electric Power Engineering
More informationHigh Vibration Analysis of Eddy Current Drum Coupled Motor to a Vertical Centrifugal Pump Solution Based on EMA, ODS and FEA By:
Juan Gamarra Mechanical Solutions, Inc. High Vibration Analysis of Eddy Current Drum Coupled Motor to a Vertical Centrifugal Pump Solution Based on EMA, ODS a FEA By: Jody Barksdale, PE Juan R. Oqueo,
More informationMODEL MODIFICATION OF WIRA CENTER MEMBER BAR
MODEL MODIFICATION OF WIRA CENTER MEMBER BAR F.R.M. Romlay & M.S.M. Sani Faculty of Mechanical Engineering Kolej Universiti Kejuruteraan & Teknologi Malaysia (KUKTEM), Karung Berkunci 12 25000 Kuantan
More informationCombined analytical and FEM method for prediction of synchronous generator no-load voltage waveform
Combined analytical and FEM method for prediction of synchronous generator no-load voltage waveform 1. INTRODUCTION It is very important for the designer of salient pole synchronous generators to be able
More informationWe are IntechOpen, the first native scientific publisher of Open Access books. International authors and editors. Our authors are among the TOP 1%
We are IntechOpen, the first native scientific publisher of Open Access books 33 15, 1.7 Mio Open access books available International authors and editors Downloads Our authors are among the 151 Countries
More informationUsing frequency and modal analysis to attenuate low frequency waves
Using frequency and modal analysis to attenuate low frequency waves Stanislav ZIARAN 1 1 Slovak university of technology in Bratislava Faculty of mechanical engineering, Slovakia ABSTRACT The paper analyzes
More informationOverview of condition monitoring and vibration transducers
Overview of condition monitoring and vibration transducers Emeritus Professor R. B. Randall School of Mechanical and Manufacturing Engineering Sydney 2052, Australia Machine Monitoring and Diagnostics
More informationAnalysis on exciting winding electromagnetic force of Turbogenerator under rotor interturn short circuit fault
International Conference on Advanced Electronic Science and Technology (AEST 2016) Analysis on exciting winding electromagnetic force of Turbogenerator under rotor interturn short circuit fault a Hao Zhong,
More informationCurrent-Based Diagnosis for Gear Tooth Breaks in Wind Turbine Gearboxes
Current-Based Diagnosis for Gear Tooth Breaks in Wind Turbine Gearboxes Dingguo Lu Student Member, IEEE Department of Electrical Engineering University of Nebraska-Lincoln Lincoln, NE 68588-5 USA Stan86@huskers.unl.edu
More informationSYSTEM IDENTIFICATION: A STUDY OF VARIOUS METHODS FOR CONTINUOUS SYSTEMS
SYSTEM IDENTIFICATION: A STUDY OF VARIOUS METHODS FOR CONTINUOUS SYSTEMS Ayush Raizada, Vishnuvardhan Krishnakumar, Dr. P. M. Singru Abstract This paper addresses and evaluates the methods of system identification
More information430. The Research System for Vibration Analysis in Domestic Installation Pipes
430. The Research System for Vibration Analysis in Domestic Installation Pipes R. Ramanauskas, D. Gailius, V. Augutis Kaunas University of Technology, Studentu str. 50, LT-51424, Kaunas, Lithuania e-mail:
More informationROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS
ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS SZABÓ Loránd DOBAI Jenő Barna BIRÓ Károly Ágoston Technical University of Cluj (Romania) 400750 Cluj, P.O. Box 358,
More informationMonopile as Part of Aeroelastic Wind Turbine Simulation Code
Monopile as Part of Aeroelastic Wind Turbine Simulation Code Rune Rubak and Jørgen Thirstrup Petersen Siemens Wind Power A/S Borupvej 16 DK-7330 Brande Denmark Abstract The influence on wind turbine design
More informationPermanent Magnet Machine Can Be a Vibration Sensor for Itself M. Barański
Permanent Magnet Machine Can Be a Vibration Sensor for Itself M. Barański Abstract This article presents a new vibration diagnostic method designed to (PM) machines with permanent magnets. Those devices
More informationAlso, side banding at felt speed with high resolution data acquisition was verified.
PEAKVUE SUMMARY PeakVue (also known as peak value) can be used to detect short duration higher frequency waves stress waves, which are created when metal is impacted or relieved of residual stress through
More informationAnalysis on Harmonic Loss of IPMSM for the Variable DC-link Voltage through the FEM-Control Coupled Analysis
J Electr Eng Technol.2017; 12(1): 225-229 http://dx.doi.org/10.5370/jeet.2017.12.1.225 ISSN(Print) 1975-0102 ISSN(Online) 2093-7423 Analysis on Harmonic Loss of IPMSM for the Variable DC-link Voltage through
More informationImproved direct torque control of induction motor with dither injection
Sādhanā Vol. 33, Part 5, October 2008, pp. 551 564. Printed in India Improved direct torque control of induction motor with dither injection R K BEHERA andspdas Department of Electrical Engineering, Indian
More informationExperimental Study of Vibrations in the Switched Reluctance Motor
Experimental Study of Vibrations in the Switched Reluctance Motor W. Cai Delco Remy America 292 Enterprise Drive Anderson, IN 4613, USA Phone: +1 765-778-671 Fax: +1 765-778-6575 Email: caiw@delcoremy.com
More informationIterative Learning Control of a Marine Vibrator
Iterative Learning Control of a Marine Vibrator Bo Bernhardsson, Olof Sörnmo LundU niversity, Olle Kröling, Per Gunnarsson Subvision, Rune Tengham PGS Marine Seismic Surveys Outline 1 Seismic surveying
More informationVibration Analysis of deep groove ball bearing using Finite Element Analysis
RESEARCH ARTICLE OPEN ACCESS Vibration Analysis of deep groove ball bearing using Finite Element Analysis Mr. Shaha Rohit D*, Prof. S. S. Kulkarni** *(Dept. of Mechanical Engg.SKN SCOE, Korti-Pandharpur,
More informationAbstract. Vibroacustic Problems in High SpeedmTrains. Felix Sorribe Palmer, Gustavo Alonso Rodrigo, Angel Pedro Snaz Andres
Vibroacustic Problems in High SpeedmTrains Felix Sorribe Palmer, Gustavo Alonso Rodrigo, Angel Pedro Snaz Andres Abstract Passengers comfort in terms of acoustic noise levels is a key train design parameter,
More informationCouchet Harpsichord soundboard vibroacoustics behaviour: An application of the Impact Nearfield Acoustical Holography (IPNAH)
Couchet Harpsichord soundboard vibroacoustics behaviour: An application of the Impact Nearfield Acoustical Holography (IPNAH) S. Le Moyne a, S. Le Conte b and F. Ollivier a a UPMC Univ Paris 6, CNRS UMR
More informationElectromagnetic Force Coupling in Electric Machines Mark Solveson, Cheta Rathod, Mike Hebbes, Gunjan Verma, Tushar Sambharam ANSYS, Inc.
Electromagnetic Force Coupling in Electric Machines Mark Solveson, Cheta Rathod, Mike Hebbes, Gunjan Verma, Tushar Sambharam ANSYS, Inc. 1 ANSYS, Inc. September 29, Introduction Low noise regulation Aimed
More informationThe Fundamental Characteristics of Novel Switched Reluctance Motor with Segment Core Embedded in Aluminum Rotor Block
58 Journal of Electrical Engineering & Technology, Vol. 1, No. 1, pp. 58~62, 2006 The Fundamental Characteristics of Novel Switched Reluctance Motor with Segment Core Embedded in Aluminum Rotor Block Jun
More informationCapacitive MEMS accelerometer for condition monitoring
Capacitive MEMS accelerometer for condition monitoring Alessandra Di Pietro, Giuseppe Rotondo, Alessandro Faulisi. STMicroelectronics 1. Introduction Predictive maintenance (PdM) is a key component of
More informationT40FH. Torque flange. Special features. Data sheet
T40FH Torque flange Special features - Nominal (rated) torques: 100kNm, 125kNm, 150kNm, 200kNm, 250kNm, 300kNm - Nominal (rated) rotational speed of 2000 rpm up to 3000 rpm - Compact design - Version for
More informationTexas Components - Data Sheet. The TX53G1 is an extremely rugged, low distortion, wide dynamic range sensor. suspending Fluid.
Texas Components - Data Sheet AN004 REV A 08/30/99 DESCRIPTION and CHARACTERISTICS of the TX53G1 HIGH PERFORMANCE GEOPHONE The TX53G1 is an extremely rugged, low distortion, wide dynamic range sensor.
More informationEnergy efficient active vibration control strategies using electromagnetic linear actuators
Journal of Physics: Conference Series PAPER OPEN ACCESS Energy efficient active vibration control strategies using electromagnetic linear actuators To cite this article: Angel Torres-Perez et al 2018 J.
More informationModal Parameter Estimation Using Acoustic Modal Analysis
Proceedings of the IMAC-XXVIII February 1 4, 2010, Jacksonville, Florida USA 2010 Society for Experimental Mechanics Inc. Modal Parameter Estimation Using Acoustic Modal Analysis W. Elwali, H. Satakopan,
More informationUnequal Teeth Widths for Torque Ripple Reduction in Permanent Magnet Synchronous Machines With Fractional-Slot Non-Overlapping Windings
Unequal Teeth Widths for Torque Ripple Reduction in Permanent Magnet Synchronous Machines With Fractional-Slot Non-Overlapping Windings Ilya Petrov, Pavel Ponomarev, Yulia Alexandrova, Juha Pyrhönen, LUT
More informationRare-Earth-Less Motor with Field Poles Excited by Space Harmonics
Rare-Earth-Less Motor with Field Poles Excited by Space Harmonics Theory of Self-Excitation and Magnetic Circuit Design Masahiro Aoyama Toshihiko Noguchi Department of Environment and Energy System, Graduate
More informationSignal Analysis Techniques to Identify Axle Bearing Defects
Signal Analysis Techniques to Identify Axle Bearing Defects 2011-01-1539 Published 05/17/2011 Giovanni Rinaldi Sound Answers Inc. Gino Catenacci Ford Motor Company Fund Todd Freeman and Paul Goodes Sound
More informationVIBRATIONAL MODES OF THICK CYLINDERS OF FINITE LENGTH
Journal of Sound and Vibration (1996) 191(5), 955 971 VIBRATIONAL MODES OF THICK CYLINDERS OF FINITE LENGTH Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
More informationGenerator Advanced Concepts
Generator Advanced Concepts Common Topics, The Practical Side Machine Output Voltage Equation Pitch Harmonics Circulating Currents when Paralleling Reactances and Time Constants Three Generator Curves
More informationChallenges and Solutions for IPMSM to be Used as a Next Generation Electrical Machine
Proceedings of the 2011 International Conference on Industrial Engineering and Operations Management Kuala Lumpur, Malaysia, January 22 24, 2011 Challenges and Solutions for IPMSM to be Used as a Next
More informationSVENSK STANDARD SS :2014
SVENSK STANDARD SS 728000-1:2014 Fastställd/Approved: 2014-06-30 Publicerad/Published: 2014-07-01 Utgåva/Edition: 1 Språk/Language: engelska/english ICS: 25.040.20 Spindlar för verktygsmaskiner Utvärdering
More informationBASICS OF STRUCTURAL VIBRATION TESTING AND ANALYSIS
CI PRODUCT NOTE No. 006 BASICS OF STRUCTURAL VIBRATION TESTING AND ANALYSIS Damping material reduces vibration amplitudes of structure Active suppression uses sensors, electronic controls, and mechanical
More informationSystem Inputs, Physical Modeling, and Time & Frequency Domains
System Inputs, Physical Modeling, and Time & Frequency Domains There are three topics that require more discussion at this point of our study. They are: Classification of System Inputs, Physical Modeling,
More informationBASICS OF MODAL TESTING AND ANALYSIS
CI PRODUCT NOTE No. 007 BASICS OF MODAL TESTING AND ANALYSIS WWW.CRYSTALINSTRUMENTS.COM BASICS OF MODAL TESTING AND ANALYSIS Introduction Modal analysis is an important tool for understanding the vibration
More informationA Practical Guide to Free Energy Devices
A Practical Guide to Free Energy Devices Part PatD14: Last updated: 25th February 2006 Author: Patrick J. Kelly This patent application shows the details of a device which it is claimed, can produce sufficient
More information